radiator leak

I agree. Where I live, -32F (50/50 mixture) does not assure enough
protection. I usually use about 60/40 myself for the very reasons you cite.
I believe that the mixture "bottoms out" at around -84 degrees F at 70/30.
This is from memory so may not be 100% correct. I am sure others who know
for sure will correct this if it is wrong.

Bob

"Private" > wrote in message
news:xHbcg.179873$P01.65596@pd7tw3no...
> While IMHO 70/30 is a bit too strong (and will do nothing to prevent the
> failure of plastic radiator end caps) there is a case to be made for a
> mixture slightly stronger than 50/50.
>
> The maximum freeze protection (for ethylene glycol) is at approx 60%.
> IMHO 55/45 or 60/40 is better than 45/55 or 40/60 and the real danger with
> too weak a solution is not freezing but rather gelling ...